Rough-rounding machine



Jan. 14, 1930.- R. D..PooLE ROUGH ROUNDING MACHINE Filed Jan. 12, 1929 ISSheets-Sheet 1 131 III IIIIII. lll |||I||||I||I|IIII|| IIIIII PIII...

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Jan. 14, 1930. R. D. POOLE ROUGH ROUNDING MACHINE v s sheets-sheet 2 Filed Jan. 12, 1929 Jan. 14, 1930. R. D. POOLE 1,743,685

ROUGH ROUNDING MACHINEI Filed Jan. 12, 1929 5 Sheets-Sheet 3 Patented Jan. 14, 1,930

Roscoe D. ,Poom F DANVEIeS, MASSACHUSETTS Rouen-Roumaine MACHINE Application led January 12,1929. vSerial No. 332,123.

My invention relates to rough rounding machines such as are employed to trim the marginal portions of theoutersoles of boots and shoes during the process of manufacture ing the latter, and it has `for its object to provide an improved machine of this class.

To this' end I `have provided an improved rough rounding machine having the peculiar featuresof construction and mode of .opera- 1o tion set .forth in `the following description, the several novel features of the invention being particularly `pointed outand defined in the lclaims at theclose thereof.

In the -accompanying drawings Figure l isa side elevation of a rough rounding machine censtructed in accordance with my invention. Y

Figure 2 is a sectional detail, full size, relating to the anvil mechanism hereinafter described.

Figure 3 isa plan view, partly vbroken away and infsectien, of the machine shown in Fig. 1.

Figure 4 is a section on line 44-4 of Fig. 1.

Figure 5 is a plan view, fullsize, of the rotatable anvil.

Figure 6 is Section Qn line .G+S ef .-Fg'- 2- Figure 7 is a side elevation, full size, of the lower portion of the knife hereinafter 30 described.

Figure 8 is e front elevation, .full Size, ef the lower portion of the knife hereinafter described.

Figure 9 illustrates -the .Shape ef the eutting edge ofthe knife showntin Figs. 7 and 8.

Figure 10 is a plan view, partly in section, of a portion of the rear end of thelmachine showing part of the; actuating mechanism `for the rotatable anvil. Y

Figure 11 isa detail hereinafter described.

Having reference to the drawings, 1 0 is .the frame .of my improved rough rounding machine,,said frame being adapted to be fixed in position vupon ya bench orother suitable support. Fulcrumed on this frame at ,1 1 iealever l2 her-ies e rearwardly extending arm formedwith a slot 13 within which Yare slidably mounted two half-bearing blocks 14 which embracea crank 15 that `is partofa main drive shaft 16. At-'their rear irthe anvil 24. Thus the anvil 24 can be posiends the two branchesY or arms ofthis rearwardly extending slotted arm are held against spreading or yielding by means of a bolt 17. A Y

The other forwardly extending arm .of l5 5 lever 12 is made at its -.-free end with a head 18 having an outer arcuate face formed with an arcuate slot 1.9 that is concentric with the axis of the fulcrum pin l1.` Within this slot 19 isfarranged and litted a correspondingly e0 curved knife V2O which is clamped rigidly tov the head 18 by `,means of a plate 21 and screws `22.

The lower end of knife A2,0 is made `witha ,cuttingiedge 23 and cofoperates with a cire5 cular llanvil `24 4herein shown asia conical disk ,fired rigidly te the upper ,end 0f a Short vertical spindle or shaft 25 by means of `a pin2 andscrew 27. Shaft 25 ,is journaled a bracket made up ,Ofen 21.111r127 V`Sleeve 28 Je and box 29, the arm 27 being formed with ,two parallel slots 30 to accommodate two kscrews 31 by means of which the bracket is clamped fixedly to frame 10 butwith pro- :vision Yfer adjustment in a dreeten that `varies the position of the knife radially with respect to the v`anvil 24. As will lbe :clear from Figs. l and 5, the arcuate cutting edge 23 is disposed in and crosswise of a vertical plane coincident with the -axis of anvil 24 so and parallel with the slots 30, so that when the screws 3 1 are loosened and arm 27 is ,adjusted on frame ,10 the cutting position of the knife is varied radially 'with respect to tioned sok that 'the cutting edge 23 ofthe 'knife vwillcooperate with said anvil.at any desired distance inwardly from the outer periphery .thereof within the limits of the slots 3,0. eo The upper end of the sleeve 28 is forced i' into the arm `27 thereby rigidlyand permanently joining the two, while the box 29 is i fixed rigidly to the lower end of sleeve 28 I by a screw 32. 95

The box 29 serves as a housing for a ratchet wheel 33 and pawl carrier 34, Figs. 2

and 6, mounted uponv the lower end of shaft 2 5, the former beingkeyed to said shaft by a pin 35 while the latter is loosely vmounted 10o thereon. Ratchet wheel 33 and pawl carrier 34 are held in position on lshaft 25 by the head of a screw 36. Spring pressed pawls 37 of different lengths are provided upon the top side of carrier 34 to cooperate with ratchet wheel 33.

The pawl carrier 34 has pivotally con- 'nected to it the forward end of a. connecting rod 38 whose rear threaded end extends through and is in threaded engagement with a block 39 swivelly connected to one' arm of a bell-crank lever 40 fulcrumed at-41 on frame 10. This lever 40 is within the frame 10, and its other horizontally disposed' arm is directly below and in the path of the rearwardly extending slotted arm of lever 12 so that it is hunted bythe latter-during each downward stroke thereof. V.Thus during each revolution of main shaft 16Athe bell crank 40 is swung in one direct-ion bylever 12 and inthe opposite direction by a spring-42 whereof one end is connectedwith, the rear end of r'od 38 and the opposite end with frame -10. The lever 12 always swings the bell-crank 40 to the same position at the limit of its movement in one direction, but the movement of said'bell-crank-in the opposite direction under the influence of spring 42 is limited by an-adjustable stop 43 herein shown as an eccentric provided at the inner end of a spindle 44 journaled in a bearing provided in oneof the side walls of frame 10. Thus by rotative adjustment of stop 43 the extent of movement imparted to bellcrank 40 by lever 12 and springA 42 can be varied. i

It will be clear that the vibration of bellcrank 40 thus occasioned byv lever 12 acts through rod 38 to oscillate pawl carrier 34 whose pawls 37 act through ratchet wheel-33 and shaft 2'5 to rotate anvil 24 step-by-step in the'direction indicated by the arrow in Fig. 5. i i

As shown in Fig. 10, the outer endportion of the spindle 44 has ixedly mounted thereon a handwheel 45 made with a tubular 'hub within which is arranged a compressed coiled spring 46 that yieldingly holds the stop eccentric k43 against the adjacent side wall of frame 1() thereby preventing its accidental rotative displacement.

Rotative movement or displacement of anvil 24 otherwise than by pawls 37 is prevented by means of friction brakes herein shown as felt pads 47 compressed against f opposite sides of shaft 25 by screws 48, each screw and its pad being mounted within a radial cylindrical chamber provided in arm 27.

The knife 2O is positioned on lever 12 so that when the forwardly extending arm of the latter is at the limit of its movement toward anvil 24 the cutting edge 23 o'f the knife is in contact with the top surface of said anvil. It follows, therefore, that said ing screws 22-the knife 2O can be accurately adjusted endwise in its groove 19 by rotation of thumbscrew 51.

At 52 is vshown a presser-foot lever that is pivoted at 53 to-a bracket 54 rigidly fastened to frame l0. At Yone vside of pivot the presser foot is made-with a chamber 55 containingk a coiled spring-56 whose lower end bears upon the top of .bracket 54and whose upper end bears against an adjustable abutment screw 57.l At the opposite side of pivot v53 the presser-foot 52 carries an adjustable stop screw 58that is yieldingly urged toward, or held against, bracket 54 by spring 56 while at the same time the front workengagingA arm of the presser-foot is yieldingly urged downwardly toward anvil 24.

rl`he main shaft 16 carries a loose pulley 59and a tight pulley 60 to co-operate with a continuously running, power-driven belt, not shown, lwhich drivesshaft 16 at a high rate of speed when engaged with tight pulley 60.

The arms of bell-crank 4() are provided with abutment fibre pads 61 and 62 to cooperate, respectively, with lever 12 and stop 43, said pads minimizing both noise and wear. j

Y In trimmingthe sole of a shoe the latter i is presented to the machine upside down with the margin of the sole occupying a position on top of anvil 24; with the presserfoot bearing upon the topmost, or tread, side of the sole and with the peripheral edge of the anvil 24 snugly fitted into the inseam. Then the machine is started with the shoe held in this position by the operator the lever 12 is rapidly vibrated while the anvil is rotated step by step. As the shoe is thus fed'past the knife and anvil the operator assists in guiding the same and also swings it around at the heel and toe, at all times pressing the shoe sidewise against the anvil.

Since the'cutting edge of the knife is arcuate and positioned with its concaved side nearest or facing the axis of the anvil, it will now be clear that in traversing the inward 'curves at-the shank of the sole", av smoothly cut edge is produced on the sole which would be impossible with a knife having'a straightl cutting edge. At the same time the edges produced upon the sole to the rear, and forward, of the shanky are'smooth and even, since each step movement imparted to the anvil and work is much less than the length of the cutting edge of the knife. Y

As shown in Fig. 5, the marginal portion of the top surface of the anvil is knurled or roughened as at 611 to avoid slipping of the shoe on the anvil and to ensure movement of the shoe with the latter. Y

It is a feature of my new machine that the vibrating lever 12 is fitted snugly between two large bearings 65 and 66, Figure 3, with bronze washers 67 interposed between the hub of lever 12 and said bearings and with the latter provided with bushings 68, Figures l and 3, for the pivot pin 11. This pivot pin 11 is fastened to the lever 12 by a screw 69, and therefore rocks within the bushings 68 when the lever 12 is vibrated.

It is also a feature of the construction herein illustrated that the crank 15 is an integral part of the shaft 16 and-the latter is provided with trunnion or journal por.- tions at each end of the crank 15 which are mounted within bushings provided in very substantial bearings 70 on the frame of the machine. Therefore the crank 15k is substantially supported at both ends thereof.

lVith the machine constructed in this fashion the lever 12 can move only in a vibratory fashion and is firmly held against movement in any other direction.

What I claim is:

1. A sole trimming machine comprising a rotatable anvil wheel having a fiat sole-supporting surface and a shoe-guiding periphery; a chopping knife; a movable carrier by which said knife is supported opposite and edgewise with respect to the flat sole-supporting surface of said anvil; means for operating said carrier to impart edgewise reciprocating motion to the knife thereby to cause the same to chop entirely through the marginal portion of the sole while the portion of the latter that is being operated upon by the knife is directly supported against the thrust of the knife by said anvil', and means for positively rotating said anvil wheel to feed the shoe past said cutter.

2. A sole trimming machine constructed in accordance with claim 1 wherein the means for positively rotating the anvil wheel actuates the latter step-by-step in alternation with the cutting strokes of the knife.

3. A sole trimming machine constructed in accordance with claim l wherein the means for positively rotating the anvil wheel actuates the latter step-by-step in alternation with the cutting strokes of said knife, and wherein there is also provided means for regulating the extent of angular movement imparted to said anvil wheel during each step movement thereof.

4. A sole trimming machine constructed in accordance with claim 1 wherein the means for positively rotating the anvil wheel actuates the latter step-by-stepv in alternation with the cutting strokes of the knife and is itself actuated by said carrier in timed rela tion with said cutting strokes. Y n

5. A sole trimming machine constructed in accordance with claim lwherein the means for positively rotating the anvil wheel actul' ates" the'latter step-by-step in alternation with the` cutting strokes of said knife, and wherein` there is also provided a friction brake foryieldingly opposing rotary movement of said anvil wheel. Y

6. A sole trimming machine constructed in accordance with claim l wherein the means for positively rotating the anvil wheel includes a member that is bunted in onedirection by said carrier; a spring for returning said member in the opposite direction, and pawl and ratchet mechanism through which said'member actuates said anvil wheel stepby-step in alternation with the cutting strokes of said knife.

7. A sole trimming machine comprising an anvil having a shoe-guiding edge and a flat sole-supporting surface; a chopping knife havingan arcuate cutting edge which is parallel and approximatelycoincident with said sole-supporting surface at times and whose convex side faces said shoe-guiding edge; a movable carrier by which said knife is supported opposite and edgewise with respect to said flat sole-supporting surface of said anvil, and means for operating said carrier to impart edgewise reciprocating motion to said knife thereby to cause the same to `chop entirely through the marginal portion ofthe sole while the portion thereof that is being operated upon by the knife during its cutting stroke is directly supported against the thrust of the latter by said anvil. Y y

8. A sole trimming machine constructed in accordance with` claim 7 wherein, with respect to the -knife and anvil, one'of` said ele'- ments is adjustable relatively to the other in a direction parallel with said sole-sup porting surface to vary the distance between said shoe-guiding edge and said knife edge.

9. A sole trimming machine constructed in accordance with claim 7 wherein, with respect te the knife andA anvil, one of said elements is adjustable relatively to the other to vary the distance between said shoe-guiding edge and said-knife edge. f

10. A sole trimming machine comprising a rotatable anvil wheel having aflat solesupporting surface and a shoe-guiding pe riphery; a chopping knife having an arcuate cutting edge which is parallel and approximately coincident with said sole-supporting surface at times and whose convex side faces said shoe-guiding periphery; a movable carrier by which said knife is supported opposite and edgewise with respect Wise reciprocating motion to said' knife thereby to cause the same to chop entirely through the marginal portion of the sole While the part thereof that is .being operated upon by the knife during each cutting stroke is directly supported against the thrust of the latter by said anvil Wheel; a bracket on which said Wheel is journaled, saidibracket beingiadjustable to vary the distance Vbetween said shoe-guiding periphery and said knife; a lever operated by said carrier, and paWl and ratchet mechanism through which saidlever rotates said Wheel step-by-step in timed relation With the movements of said knife. Y

11. A sole trimming machine comprising a base provided with a pair of upstanding spaced apart bearing lugs; a rotatable anvil wheel having a horizontal iat sole-support,- ing surface and a shoe-guiding periphery; said Wheel being rotatably lmounted on said frame; a chopping knife co-operating With Y said anvil wheel; a lever pivotally mounted between and in engagement with said upstanding bearing lugs, said lever having an arm extendingin one direction formed With a slot that is closed at its opposite ends and having another armV ,extendingin another direction on Which said chopping knife is mounted opposite and edgewise with respect to the flat sole-supporting surfaceof said anvil; a shaft journaled in two separated bearings on said frame and formed with a crank disposed between said bearings and occupying the slot of said lever, and means for rotating said shaft to cause the crank i to vibrate the lever thereby to impart an Y edgewise reciprocating motion to the knife so that its cuttingfedge is carried upto and -f away from said at sole-supporting ,surface of the anvil wheel. Y 1

Signed by me at Danvers, Essex County, Massachusetts, this 5th day of January,

ROSCOE D. POOLE. 

